Wood chipper



FIG. 1 is a perspective view of a wood chipper showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the wood chipper, which form no part of the claimed design. 

CLAIM The ornamental design for a wood chipper, as shown and described. 